Since the SteamVR 2.0 update, when launching a non-VR application from Steam Library a theater screen from Steam will be displayed automatically inside VHT, over the already existing desktop screens from VHT. You can deactivate this feature from Steam by changing the steam settings as: set 'SteamVR Setting->Advanced Settings' to Show set 'SteamVR Setting->Dashboard->Present Non-VR Application on Theater Screen Upon Launch' to Off https://steamcommunity.com/app/989060/discussions/0/1608274347728620914/